Can you tell me about the different types of rocks?
There are three main types of rocks: igneous, metamorphic, and sedimentary. Igneous rocks are formed by the cooling and solidification of molten rock. Metamorphic rocks are formed when existing rocks are subjected to high temperatures and pressures, which changes their chemical nature. Sedimentary rocks are formed by the accumulation and cementation of sediment. They are typically layered, and can be further subdivided into clastic, chemical, and organic rocks.